98 ZOANTHARIA — ARACHNACTIS 



Zoantliapia. 



ARACHNACTIS ALBIDA M. Sars.^ 

 (Vanhoffen: Biblioth. zool. 1895 XX PI. I.) 



1898 August: 60° N 4° W.; 61° N. 0° W., common. 

 Septembet- 60° N. 6° W.; 60° N. 3° W., not rare. 



1899 September: 62° N. 1° E., rare. 



Temperature: 12. i, mean of 4 obs., max. 13, min. 10.4. 



Salinity; 35.37, mean of 4 obs., max. 35.4?, min. 35.24. 



Plankton-type. This species is only known to exist from 

 about 56° N. 20° W. to 61° 50' N. 5° 20' E. The mean temperature 

 and salinity agree with the numbers for Styli-plankton, but as long 

 as the distribution is not better known, the plankton-type may be 

 undecided. 



Ostenfeld's data used. 



